Day 33: JavaScript Map, Set, WeakMap, WeakSet - When & Why to Use Them! 🤩

Veröffentlicht am: 12 Juni 2025
auf dem Kanal: tapaScript by Tapas Adhikary

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In this video, we take a deep dive into JavaScript Collections—Map, Set, WeakMap, and WeakSet. Whether you’re a beginner or brushing up on advanced JavaScript, this session will help you understand when to use each, their key differences, and real-world use cases with clear examples.

✅ You’ll learn:
What are Map, Set, WeakMap, and WeakSet?
Differences between Objects, Arrays, and these collections
When to use and when to avoid each
Real-life scenarios in frontend and backend development
Memory management benefits using WeakMap & WeakSet

Let's GO 🚀. Do not miss it out.

🎯 Perfect for:
JavaScript developers, frontend/backend devs, and anyone preparing for tech interviews.

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Timecodes
0:00 - Intro & Topics to Learn
03:33 - Objects and Arrays
05:34 - Object & Array Shortcomings
07:42 - Map
09:01 - Create & Initialize Map
12:11 - Adding Map Entries
13:47 - How to Get Map Value?
15:02 - Map Keys
19:39 - Map Properties & Methods
23:29 - MapIterator
29:07 - Convert Object to Map
32:15 - Convert Map to Object
33:21 - Convert Map to Array
34:42 - Map vs Object
37:42 - Set
38:26 - Create & Initialize Set
39:54 - Set Properties & Methods
43:17 - SetIterator
45:39 - Set and Array
49:29 - Set and Objects
55:20 - Set Theories
01:06:29 - WeakMap
01:17:51 - WeakSet
01:20:06 - Tasks

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About Me:
Tapas Adhikary is an Educator at tapaScript, a Tech enthusiast, Writer, YouTuber, and maintainer/contributor of open-source projects. He is a full-stack developer with vast experience building SaaS solutions. He is the founder of the ReactPlay platform, which is driven by open-source projects and a fast-growing community.

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#javascript #map #set #WeakMap #WeakSet #JavaScriptCollections #webdevelopment #codingtutorials #frontenddeveloper #backend

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